Add tests for rebase mr checkbox

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

features/project/merge_requests.feature

@@ -227,3 +227,11 @@ Feature: Project Merge Requests
     And I should not see merge button
     When I click link "Approve"
     Then I should see approved merge request "Bug NS-04"
+
+  Scenario: I should see rebase checkbox
+    Given project "Shop" have "Bug NS-05" open merge request with diffs inside
+    And rebase before merge enabled
+    And merge request "Bug NS-05" is mergeable
+    And I visit merge request page "Bug NS-05"
+    And merge request is mergeable
+    Then I should see rebase checkbox

features/steps/project/merge_requests.rb

@@ -356,6 +356,16 @@ class Spinach::Features::ProjectMergeRequests < Spinach::FeatureSteps
     end
   end
 
+  step 'rebase before merge enabled' do
+    project = merge_request.target_project
+    project.merge_requests_rebase_enabled = true
+    project.save!
+  end
+
+  step 'I should see rebase checkbox' do
+    expect(page).to have_content 'Rebase before merge'
+  end
+
   def merge_request
     @merge_request ||= MergeRequest.find_by!(title: "Bug NS-05")
   end